Thomas bailey



(No Model.) l T.. BAILEY;

FIREPROOF 'FLOOR STRUGTURE.

v Qa Z1/Tiri Y 94; f1- 71/\ 71 j@ A i' Y WITNESSES- PATENT FFC.

THOMAS BAILEY, or NEW YORK, N. Y.

fjFlREPRooF r-"Loo'ri STRUCTURE.

SPECIFICATION forming part of Letters Patent No. 534,189, dated February12, 1895.

Application nea nach 19,1894..

To 'all whom it may concern:

the beams, and it consists of dovetail ribbed andgrooved metallic sheetswhereof the webs of the/bottoms of the grooves are flat, for the supportof the [ire proof material between the oor beams and resting at the endson the lower iianges of the beams,\with`plaster coating ofthe underside, and said lplates when straight adapted for positive resistance toend thrusts to prevent lateral `movement of the beams, the plaster beingsecured by anchorage in the dovetail grooves land largely reinforcingthe power of `the sheets both for supporting weight and resisting endthrusts, whereby I provide cheaper and stronger iilling between thebeams and such as may be more readily used.

Y My invention also comprises a simple contrivance for suspendingprotective coverings for the under sides of the beams from thesupporting sheets of the filling material be tween the beams, all ashereinafter fully described, reference being made to the accom- Vpanyingdrawings, in which@ Figure 1, is a transverse section of thefloor beams, and of the intermediate filling as I construct it. Fig. 2,is a `section on line -x Fig. 1. Fig. 3, is a transverse section of theiioor beams and the intermediate filling with the ribbed and groovedsheets in arched form. Fig. 4, is a section of Fig. 3 on line y-y. Fig.

5, is a'plan view of a section of the skeleton floor.A Fig. 6, is adetail in section showing a modified arrangement for protecting theunder sides of the beam. Fig. 7, is a detail showing the shape of theends of the' sheets for the way of protecting the under sides of thebeams as inFig. 6. Fig. 8, is a plan view of one'form of bar employedfor suspending the lathing 'strips under the'floor beams. Fig. 9, is aplan View of another form of suspending bar for lthe same purpose. Fig.l0, is a detail showing a side view of part of a iioor beam, secserinNo. 504,152. (No moda.)

tion of part of a ribbed and grooved sheet, l

and end View of the lathing strip supporting bar of Fig. 8 placed inposition, and Fig. 11, is' afview'similar to that of Fig. 10, showingthe lathing strip of Fig. 9 in position.

A represents/a couple of metal floor beams between which the fire prooffilling is to be placed. v I

b represents thin sheets of metal which are dovetail ribbed andgroovedlengthwise, with fiat webs' of the bottoms of the grooves andplaced between the beams with the ends resting on the lower iianges a,of the beams.

c represents filling of plaster,`cement, or`

other approved fire proof material, and d represents a plaster coatingof the lower surface ofthe plates secured by the anchors c, pressed intothe dovetail grooves ot' the under side of the sheets.

lThe metal sheets will be first crimped in the usual manner of crimping,and then they will be placed in position loosely side byside with theends resting on the flanges a, and with the edges touching-each other,and will then be covered above with any kind of cheap non-combustiblefilling material shoveled in and lightly tamped and finished with asmooth top tinish of `mortar. The under coating should be agood qualityof plaster adapted to set hard and smooth and have strength to holdsecurely. Sheets of thin, light, andinexpensive character thus crimpedalo'rd ample strength for strong floors, the strength largely dependingupon the depth of the crimps which may be more or less according tocircumstances.

The crimped sheets will generally be flat as in Figs. l and 2, but theymay be arched as in Figs. 3, 4 and 6 for greater strength forsupportingthe filling above with less ,depth ofthe crimps. When flatasin Figs. l and 2, the ends ofthe sheets resting on the flange a, willbe recessed and beveled as atm, to let the lower surface down iiushwiththe lower surface of the beams, the recesses being pr0- duced insuch a way that the flat bearing webs of the bottoms of the grooves arepreserved, and the ends are made to abut against IOC the webs ot' thebeams for stays to prevent pensed with. lVhen the sheets are arched theends of the fiat webs of the bottoms of the grooves have bearing theirfull width on the iianges of the beams, aiording more substantial i'ootrests than the ends of ordinary corrugated sheets.

For protecting the under sides ot the beams I provide supporting bars nor o, for holding lathing sheets under said beams, said bars beingadapted to have the ends secured in dovetail grooves of the sheets b,byexpandin the split ends p of bars n, or by means of buttons q pivoted onthe ends of bars o, which when ranging lengthwise of the grooves willenter them and when entered and turned crosswise of the bars and thegrooves, and the plaster d, is applied, will be eitectually securedtherein.

In another way of protecting the under sides of the beams, moreparticularly applicable to the arched sheets, I make a notch as g, ineach end to receive theflange a, with a part l below extending a littlefarther than the part above the notch so that these parts Z will meetbelow the beam, the sheets being supported on the fianges of the beam bythe parts 1I above the notch, and to provide more substantial support ofthe ends of the plates on the iianges ot the beams I insert bearingblocks 7c, between the iianges and the upperwebs of the ribs whereby thestress is distributed, and tearing the side websof the ribs and at thesame time serve the purpose of` metal lathing for the under coating ofplaster. The upper filling may consist of cheapnuaterials for the mostpart as broken bricks or stones mixed with cement of any kind.

I am aware that iiat dovetail corrugated sheets have been used on theupper sides of wood beams for the support of floors and also on raftersfor the supportfof cement rooting, and I do not claim such applicationof such sheets myinvention being limited to thekind of floorconstruction in which the filling is located between the beams and wherethe said plates maywhen straight and thus adapted to resist powerful endthrusts-be utilized for stays to prevent lateral movement of the beams.I am also aware that both arched and flat corrugated sheets of theordinary form not having the dovetail ribs and grooves have beensimilarlyplaced on the iianges between the beams,y asin patents to Hoyt,No. 173,470; Fugman, No.475,851i, and White, No. 511,385, and I donoticlaim such device, my invention being also limited to sheets havingdovetail corrugations for holding the plaster coating both on the upperand the under sides in` a way to add largely both to the power of thesheets to `resist end thrusts, and to resiststressestend ing to breakthem, besides simplifying the means of attaching the plaster to theunder side for beingr retained thereat, and to utilize the fiat bottomsof the ribs for more substantial and reliable bearing on the supportingllanges of the beams. In the forms of corrugations represented in thesaid patents, the bearings of the sheets on the beam flanges are narrowpoints of the crowns of the inverted arches of the ribs distant fromeach other the entire length of the pitch of the corrugations which olerbut slight resistance to crushing stresses of the weight, while thebroad. flat seats of the dovetail ribs reinforced with the fillings ofcement locked in the dove tail grooves of both sides of the sheet affordample power for sustaining the greatest weight liable to befimposedtandit is to be specially noted that the "cement thus locked in the groovesof `both sides of the sheets largely stiensthe sheets against` endthrusts for greater power toresist lateralrmovements of theA beams andalso increases their power of supporting-weight. Theret'oreait is plainthat much lighter sheetswith, smaller corrugations may be usedforgivenzstrength. The cement locked in the grooves: by their', dovetail forminnites with thewebs otfthegrooves and forms a solidfmasselectually preventing the webs frombuckling understresses, whereas thecement covered sheetsoi` ordinary corrugations have `onlyr'theweight ofthe cement to oppose the crowdingtof thecement out of the grooves in theactof buckling.

1. In fire proof oor construction, dovetail ribbed and grooved sheetmetal plates having flat` webs of the bottomsof the grooves placedbetween the beams and resting at theends on the loweriiianges of theiloor` beamsgsaid f ends ofthe sheets beingyrecessed and the lowersurfacesof thesheets arranged flush with the lower surfaces of the beams,with iilling oftire proof material above,` and a `plaster coating ofthe under sidesecured in the dovetail grooves substantiallyasrdescribedi 2.` In r fire proof oor construction, `dovetail ribbed andgroovedsheet metalfplates placed between the beamsand` resting attheends on the lower flanges, of the iioor beams, with filling of :tireproof material above, a plaster coating offtherundersides of the sheets,and also under the beams, thepart under the beams supportedfrom thesheets substantially `as described.

3. In `fire proof iioor construction, dovetail ribbed and grooved sheetmetalplates placed between thebeams and resting at the ends on thelowerrilangesi ofil the floor beams, with Iillingof tiren proof materialabove, a plaster coating of theundersidesof the: sheets, and also underthe beams, `thepart` under the beams supported from the sheets bythebars having the ends secured in the dovetail grooves ofthe sheet metalplatessubstantially as described.

4:. In tireiproof-floorrconstruction the combination of metallic beamshaving `lateral anges of the lower edges, dovetail ribbed IOO forcingbearing blocks in the grooves of the.

underside of the sheets and resting on the flanges of the beams, andwith lling of fire proof material above the sheets and plaster coatingof the underside secured in the dove- I5 tail grooves substantially asdescribed.

Signed at New York city, in the county and n State of New York, this21st day of February,

THOMAS BAILEY. p

Witnesses:

W. J. MORGAN, Sg. H; MORGAN.

